Ok, replying to myself for the benefit of others who stumble upon this...
Using the -S (or --sparse) argument on the tar command when archiving MDT/MDS file systems solves the issue of the restored files being larger than the original and thus not fitting on the target file system. I would suggest that adding this to the documentation might be beificial to all who attempt to move an MDS file system :-) Thanks to the Lustre team for all their hard work, Ron. > -----Original Message----- > From: [email protected] [mailto:lustre-discuss- > [email protected]] On Behalf Of Jerome, Ron > Sent: May 21, 2009 3:39 PM > To: [email protected] > Cc: Brian J. Murrell > Subject: Re: [Lustre-discuss] MDT backup/restore > > Hmmm, a little research in the archives leads me to believe that the > --sparse option is required on the tar "create" command line. > > Would this be correct? > > BTW, this MDT is running 1.6.7.1 > > Thanks, > > _________________________________________ > Ron Jerome > Programmer/Analyst > National Research Council Canada > M-2, 1200 Montreal Road, Ottawa, Ontario K1A 0R6 > Government of Canada > Phone: 613-993-5346 > FAX: 613-941-1571 > _________________________________________ > > > > -----Original Message----- > > From: [email protected] [mailto:lustre-discuss- > > [email protected]] On Behalf Of Brian J. Murrell > > Sent: May 21, 2009 2:15 PM > > To: [email protected] > > Subject: Re: [Lustre-discuss] MDT backup/restore > > > > On Thu, 2009-05-21 at 13:39 -0400, Jerome, Ron wrote: > > > Hi all, > > > > Hi Ron, > > > > > I attempting to move my MDT to a new server and I'm seeing strange > > > behavior when trying to restore the MDT tar file taken from the > > original > > > disk to the new one. Basically, the existing MDT data appears to > use > > > about 2.5G, however when I restore the tar file on the new server > it > > > completely fills a 120G partition and the restoration fails with > out > > of > > > disk space errors?? > > > > There has been a lot of discussion on this list about backing up the > > MDT > > for relocation. Please review the archives. IIRC, there was even > > somebody reporting this exact issue. > > > > b. > > _______________________________________________ > Lustre-discuss mailing list > [email protected] > http://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
